BA178!!T / FP series Regulator ICs Standard 78 series, 3-pin regulator BA178!! !!T !! / FP series The BA178!!T and BA178!!FP series are 3pin fixed positive output voltage regulators. These regulators are used to provide a stabilized output voltage from a fluctuating DC input voltage. There are 11 fixed output voltages, as follows : 5V, 6V, 7V, 8V, 9V, 10V, 12V, 15V, 18V, 20V, and 24V. The maximum current capacity is 1A for each of the above voltages. "Application Constant voltage power supply "Features 1) Built-in overcurrent protection circuit and thermal shutdown circuit. 2) Excellent ripple regulation. 3) Available in TO220FP and TO252-3 packages, to meet wide range of applications. 4) Compatible with other manufacturers' regulators. 5) Richly diverse lineup (5V, 6V, 7V, 8V, 9V, 10V, 12V, 15V, 18V, 20V, 24V). "Product codes Output voltage (V) Product name Output voltage (V) Product name 5 BA17805T / FP 12 BA17812T / FP 6 BA17806T / FP 15 BA17815T / FP 7 BA17807T / FP 18 BA17818T / FP 8 BA17808T / FP 20 BA17820T / FP 9 BA17809T / FP 24 BA17824T / FP 10 BA17810T / FP - - BA178!!T / FP series Regulator ICs "Internal circuit configuration diagram (1) INPUT R4 R10 R8 R9 R13 Q8 Q9 Q12 D2 Q16 Q15 R5 Q13 R21 R12 Q17 R17 Q10 R11 (3) OUTPUT Q6 R6 Q5 R15 R2 R1 R16 C1 R20 Q11 D1 Q7 Q18 Q4 Q2 Q14 Q1 Q3 R19 R14 R7 R22 R18 R3 D3 (2) COMMON "Absolute maximum ratings (Ta=25C) ^Common specifications for BA178!!T / FP seriesp Parameter Symbol Applied voltage Power dissipation Limits 35 VIN TO220FP 2.0 Pd TO252-3 1.0 Unit V W Operating temperature Topr -40+85 C Storage temperature Tstg -55+150 C Reduced by 16 mW / C (TO220FP) and 8 mW / C (TO252-3) for each increase in Ta of 1C over 25C (without heat sink). "Recommended operating conditions (Ta=25C) BA17806T / FP BA17805T / FP Parameter Symbol Min. Typ. Max. Unit Parameter Symbol Min. Typ. Max. Input voltage VIN 7.5 - 25 V Input voltage VIN 8.5 - 21 V IO - - 1 A Output current IO - - 1 A Parameter Symbol Min. Typ. Max. Unit Parameter Symbol Min. Typ. Max. Unit Input voltage VIN 9.5 - 22 V Input voltage VIN 10.5 - 23 V IO - - 1 A Output current IO - - 1 A Output current BA17807T / FP Output current Unit BA17808T / FP BA178!!T / FP series Regulator ICs BA17810T / FP BA17809T / FP Parameter Symbol Min. Typ. Max. Input voltage VIN 11.5 - IO - - Output current Unit Parameter Symbol Min. Typ. Max. Unit 26 V Input voltage VIN 12.5 - 25 V 1 A Output current IO - - 1 A BA17812T / FP BA17815T / FP Parameter Symbol Min. Typ. Max. Unit Parameter Symbol Min. Typ. Max. Unit Input voltage VIN 15 - 27 V Input voltage VIN 17.5 - 30 V IO - - 1 A Output current IO - - 1 A Parameter Symbol Min. Typ. Max. Unit Parameter Symbol Min. Typ. Max. Unit Input voltage VIN 21 - 33 V Input voltage VIN 23 - 33 V IO - - 1 A Output current IO - - 1 A Output current BA17818T / FP BA17820T / FP Output current BA17824T / FP Parameter Symbol Min. Typ. Max. Unit Input voltage VIN 27 - 33 V Output current IO - - 1 A "Electrical characteristics <BA17805T / FP individual specifications> (unless otherwise noted, Ta=25C, VIN=10V, IO=500mA) Parameter Symbol Min. Typ. Max. Unit Conditions Measurement circuit Output voltage 1 VO1 4.8 5.0 5.2 V IO=500mA Fig.1 Output voltage 2 VO2 4.75 - 5.25 V VIN=7.520V, IO=5mA1A Fig.1 Input stability 1 Reg.I1 - 3 100 mV VIN =725V, IO=500mA Fig.1 Input stability 2 Reg.I2 - 1 50 mV VIN =812V, IO=500mA Fig.1 R.R. 62 78 - dB eIN =1Vrms, f=120Hz, IO =100mA Fig.2 Load regulation 1 Reg.L1 - 15 100 mV IO=5mA1A Fig.1 Load regulation 2 Reg.L2 - 5 50 mV IO=250750mA Fig.1 Ripple rejection ratio TCVO - -1.0 - Output noise voltage Vn - 40 - Minimum I/O voltage differential Vd - 2.0 Bias current Ib - 4.5 Bias current change 1 Ib1 - - 0.5 Bias current change 2 Ib2 - - 0.8 Peak output current IO-P - 1.7 - Output short-circuit current IOS - 0.6 - Temperature coefficient of output voltage mV/C IO=5mA, Tj =0125C Fig.1 V f=10Hz100kHz Fig.3 - V IO=1A Fig.4 8.0 mA IO=0mA Fig.5 mA IO=5mA1A Fig.5 mA VIN=825V Fig.5 A Tj=25C Fig.1 A VIN =25V Fig.6 BA178!!T / FP series Regulator ICs <BA17806T / FP individual specifications> (unless otherwise noted, Ta=25C, VIN=11V, IO=500mA) Parameter Min. Typ. Max. Output voltage 1 VO1 5.75 6.0 6.25 V IO=500mA Fig.1 Output voltage 2 VO2 5.7 - 6.3 V VIN=8.521V, IO=5mA1A Fig.1 Input stability 1 Reg.I1 - 4 120 mV VIN=825V, IO=500mA Fig.1 Input stability 2 Reg.I2 - 2 60 mV VIN=913V, IO=500mA Fig.1 R.R. 59 73 - dB eIN=1Vrms, f=120Hz, IO=100mA Fig.2 Load regulation 1 Reg.L1 - 16 120 mV IO=5mA1A Fig.1 Load regulation 2 Reg.L2 - 6 60 mV IO=250750mA Fig.1 Ripple rejection ratio Unit Conditions Measurement circuit Symbol TCVO - -0.5 - Output noise voltage Vn - 60 - V f=10Hz100kHz Fig.3 Minimum I/O voltage differential Vd - 2.0 - V IO=1A Fig.4 Bias current Ib - 4.5 8.0 mA IO=0mA Fig.5 Bias current change 1 Ib1 - - 0.5 mA IO=5mA1A Fig.5 Bias current change 2 Ib2 - - 0.8 mA VIN=8.525V Fig.5 Peak output current IO-P - 1.7 - A Tj=25C Fig.1 Output short-circuit current IOS - 0.6 - A VIN=25V Fig.6 Temperature coefficient of output voltage mV/C IO=5mA, Tj=0125C Fig.1 <BA17807T / FP individual specifications> (unless otherwise noted, Ta=25C, VIN=13V, IO=500mA) Parameter Symbol Min. Typ. Max. Unit Conditions Measurement circuit Output voltage 1 VO1 6.7 7.0 7.3 V IO=500mA Fig.1 Output voltage 2 VO2 6.65 - 7.35 V VIN=9.522V, IO=5mA1A Fig.1 Input stability 1 Reg.I1 - 5 140 mV VIN=925V, IO=500mA Fig.1 Input stability 2 Reg.I2 - 2 70 mV VIN=1015V, IO=500mA Fig.1 R.R. 57 69 - dB eIN=1Vrms, f=120Hz, IO=100mA Fig.2 Load regulation 1 Reg.L1 - 17 140 mV IO=5mA1A Fig.1 Load regulation 2 Reg.L2 - 6 70 mV IO=250750mA Fig.1 Ripple rejection ratio TCVO - -0.5 - Output noise voltage Vn - 70 - V f=10Hz100kHz Fig.3 Minimum I/O voltage differential Vd - 2.0 - V IO=1A Fig.4 Bias current Ib - 4.5 8.5 mA IO=0mA Fig.5 Bias current change 1 Ib1 - - 0.5 mA IO=5mA1A Fig.5 Bias current change 2 Ib2 - - 0.8 mA VIN=9.525V Fig.5 Peak output current IO-P - 1.7 - A Tj=25C Fig.1 Output short-circuit current IOS - 0.6 - A VIN=25V Fig.6 Temperature coefficient of output voltage mV/C IO=5mA, Tj=0125C Fig.1 BA178!!T / FP series Regulator ICs <BA17808T / FP individual specifications> (unless otherwise noted, Ta=25C, VIN=14V, IO=500mA) Parameter Symbol Min. Typ. Max. Unit Conditions Measurement circuit Output voltage 1 VO1 7.7 8.0 8.3 V IO=500mA Fig.1 Output voltage 2 VO2 7.6 - 8.4 V VIN=10.523V, IO=5mA1A Fig.1 Input stability 1 Reg.I1 - 5 160 mV VIN=10.525V, IO=500mA Fig.1 Input stability 2 Reg.I2 - 3 80 mV VIN=1117V, IO=500mA Fig.1 R.R. 56 65 - dB eIN=1Vrms, f=120Hz, IO=100mA Fig.2 Load regulation 1 Reg.L1 - 19 160 mV IO=5mA1A Fig.1 Load regulation 2 Reg.L2 - 7 80 mV IO=250750mA Fig.1 Ripple rejection ratio TCVO - -0.5 - Output noise voltage Vn - 80 - V f=10Hz100kHz Fig.3 Minimum I/O voltage differential Vd - 2.0 - V IO=1A Fig.4 Bias current Ib - 4.5 8.0 mA IO=0mA Fig.5 Bias current change 1 Ib1 - - 0.5 mA IO=5mA1A Fig.5 Bias current change 2 Ib2 - - 0.8 mA VIN=10.525V Fig.5 Peak output current IO-P - 1.7 - A Tj=25C Fig.1 Output short-circuit current IOS - 0.6 - A VIN=25V Fig.6 Temperature coefficient of output voltage mV/C IO=5mA, Tj=0125C Fig.1 <BA17809T / FP individual specifications> (unless otherwise noted, Ta=25C, VIN=15V, IO=500mA) Parameter Symbol Min. Typ. Max. Unit Conditions Measurement circuit Output voltage 1 VO1 8.6 9.0 9.4 V IO=500mA Fig.1 Output voltage 2 VO2 8.55 - 9.45 V VIN=11.526V, IO=5mA1A Fig.1 Input stability 1 Reg.I1 - 6 180 mV VIN=11.526V, IO=500mA Fig.1 Input stability 2 Reg.I2 - 4 90 mV VIN=1319V, IO =500mA Fig.1 R.R. 56 64 - dB eIN=1Vrms, f=120Hz, IO =100mA Fig.2 Load regulation 1 Reg.L1 - 20 180 mV IO=5mA1A Fig.1 Load regulation 2 Reg.L2 - 8 90 mV IO=250750mA Fig.1 Ripple rejection ratio TCVO - -0.5 - Output noise voltage Vn - 90 - V f=10Hz100kHz Fig.3 Minimum I/O voltage diffrential Vd - 2.0 - V IO=1A Fig.4 Bias current Ib - 4.5 8.0 mA IO=0mA Fig.5 Bias current change 1 Ib1 - - 0.5 mA IO=5mA1A Fig.5 Bias current change 2 Ib2 - - 0.8 mA VIN =11.526V Fig.5 Peak output current IO-P - 1.7 - A Tj=25C Fig.1 Output short-circuit current IOS - 0.3 - A VIN=30V Fig.6 Temperature coefficient of output voltage mV/C IO=5mA, T j =0125C Fig.1 BA178!!T / FP series Regulator ICs <BA17810T / FP individual specifications> (unless otherwise noted, Ta=25C, VIN=16V, IO=500mA) Parameter Min. Typ. Output voltage 1 VO1 9.6 10.0 10.4 V IO=500mA Fig.1 Output voltage 2 VO2 9.5 - 10.5 V VIN=12.525V, IO=5mA1A Fig.1 Input stability 1 Reg.I1 - 7 200 mV VIN=12.527V, IO=500mA Fig.1 Input stability 2 Reg.I2 - 4 100 mV VIN=1420V, IO =500mA Fig.1 R.R. 55 64 - dB eIN=1Vrms, f=120Hz, IO =100mA Fig.2 Load regulation 1 Reg.L1 - 21 200 mV IO=5mA1A Fig.1 Load regulation 2 Reg.L2 - 8 90 mV IO=250750mA Fig.1 Ripple rejection ratio Max. TCVO - -0.5 - Output noise voltage Vn - 100 - Minimum I/O voltage differential Vd - 2.0 Bias current Ib - 4.5 Bias current change 1 Ib1 - - Bias current change 2 Ib2 - Peak output current IO-P - Output short-circuit current IOS - 0.3 Temperature coefficient of output voltage Unit Conditions Measurement circuit Symbol mV/C IO=5mA, Tj =0125C Fig.1 V f=10Hz100kHz Fig.3 - V IO=1A Fig.4 8.0 mA IO=0mA Fig.5 0.5 mA IO=5mA1A Fig.5 - 0.8 mA VIN=12.527V Fig.5 1.7 - A Tj =25C Fig.1 - A VIN=30V Fig.6 <BA17812T / FP individual specifications> (unless otherwise noted, Ta=25C, VIN=19V, IO=500mA) Parameter Min. Typ. Output voltage 1 VO1 11.5 12.0 12.5 V IO=500mA Fig.1 Output voltage 2 VO2 11.4 - 12.6 V VIN=1527V, IO=5mA1A Fig.1 Input stability 1 Reg.I1 - 8 240 mV VIN=14.530V, IO=500mA Fig.1 Input stability 2 Reg.I2 - 5 120 mV VIN=1622V, IO =500mA Fig.1 R.R. 55 63 - dB eIN=1Vrms, f=120Hz, IO =100mA Fig.2 Load regulation 1 Reg.L1 - 23 240 mV IO=5mA1A Fig.1 Load regulation 2 Reg.L2 - 10 120 mV IO=250750mA Fig.1 Ripple rejection ratio Max. Unit Conditions Measurement circuit Symbol TCVO - -0.5 - Output noise voltage Vn - 110 - V f=10Hz100kHz Fig.3 Minimum I/O voltage differential Vd - 2.0 - V IO=1A Fig.4 Bias current Ib - 4.5 8.0 mA IO=0mA Fig.5 Bias current change 1 Ib1 - - 0.5 mA IO=5mA1A Fig.5 Bias current change 2 Ib2 - - 0.8 mA VIN=14.530V Fig.5 Peak output current IO-P - 1.7 - A Tj=25C Fig.1 Output short-circuit current IOS - 0.3 - A VIN=30V Fig.6 Temperature coefficient of output voltage mV/C IO=5mA, T j =0125C Fig.1 BA178!!T / FP series Regulator ICs <BA17815T / FP individual specifications> (unless otherwise noted, Ta=25C, VIN=23V, IO=500mA) Parameter Symbol Min. Typ. Max. Unit Conditions Measurement circuit Output voltage 1 VO1 14.4 15.0 15.6 V IO=500mA Fig.1 Output voltage 2 VO2 14.25 - 15.75 V VIN =17.530V, IO=5mA1A Fig.1 Input stability 1 Reg.I1 - 9 300 mV VIN=17.530V, IO=500mA Fig.1 Input stability 2 Reg.I2 - 5 150 mV VIN=2026V, IO =500mA Fig.1 R.R. 54 62 - dB eIN=1Vrms , f=120Hz, IO =100mA Fig.2 Load regulation 1 Reg.L1 - 27 300 mV IO=5mA1A Fig.1 Load regulation 2 Reg.L2 - 10 150 mV IO=250750mA Fig.1 Ripple rejection ratio TCVO - -0.6 - Output noise voltage Vn - 125 - V f=10Hz100kHz Fig.3 Minimum I/O voltage differential Vd - 2.0 - V IO=1A Fig.4 Bias current Ib - 4.5 8.0 mA IO=0mA Fig.5 Bias current change 1 Ib1 - - 0.5 mA IO=5mA1A Fig.5 Bias current change 2 Ib2 - - 0.8 mA VIN=17.530V Fig.5 Peak output current IO-P - 1.7 - A Tj =25C Fig.1 Output short-circuit current IOS - 0.3 - A VIN =30V Fig.6 Temperature coefficient of output voltage mV/C IO=5mA, Tj =0125C Fig.1 <BA17818T / FP individual specifications> (unless otherwise noted, Ta=25C, VIN=27V, IO=500mA) Parameter Min. Typ. Output voltage 1 VO1 17.3 18.0 18.7 V IO=500mA Fig.1 Output voltage 2 VO2 17.1 - 18.9 V VIN =2133V, IO =5mA1A Fig.1 Input stability 1 Reg.I1 - 10 360 mV VIN =2133V, IO =500mA Fig.1 Input stability 2 Reg.I2 - 5 180 mV VIN=2433V, IO =500mA Fig.1 R.R. 55 61 - dB eIN =1Vrms, f=120Hz, IO =100mA Fig.2 Load regulation 1 Reg.L1 - 30 360 mV IO=5mA1A Fig.1 Load regulation 2 Reg.L2 - 12 180 mV IO=250750mA Fig.1 Ripple rejection ratio Max. Unit Conditions Measurement circuit Symbol TCVO - -0.6 - Output noise voltage Vn - 140 - V f=10Hz100kHz Fig.3 Minimum I/O voltage differential Vd - 2.0 - V IO=1A Fig.4 Bias current Ib - 4.5 8.0 mA IO=0mA Fig.5 Bias current change 1 Ib1 - - 0.5 mA IO=5mA1A Fig.5 Bias current change 2 Ib2 - - 0.8 mA VIN =2133V Fig.5 Peak output current IO-P - 1.7 - A Tj =25C Fig.1 Output short-circuit current IOS - 0.3 - A VIN =30V Fig.6 Temperature coefficient of output voltage mV/C IO=5mA, Tj=0125C Fig.1 BA178!!T / FP series Regulator ICs <BA17820T / FP individual specifications> (unless otherwise noted, Ta=25C, VIN=29V, IO=500mA) Parameter Min. Typ. Max. Unit Output voltage 1 VO1 19.2 20.0 20.8 V IO=500mA Fig.1 Output voltage 2 VO2 19.0 - 21.0 V VIN=2333V, IO =5mA1A Fig.1 Input stability 1 Reg.I1 - 12 400 mV VIN=2333V, IO =500mA Fig.1 Input stability 2 Reg.I2 - 7 200 mV VIN=2632V, IO =500mA Fig.1 R.R. 53 60 - dB eIN=1Vrms, f=120Hz, IO=100mA Fig.2 Load regulation 1 Reg.L1 - 32 400 mV IO=5mA1A Fig.1 Load regulation 2 Reg.L2 - 14 200 mV IO=250750mA Fig.1 Ripple rejection ratio Conditions Measurement circuit Symbol TCVO - -0.7 - Output noise voltage Vn - 150 - V f=10Hz100kHz Fig.3 Minimum I/O voltage differential Vd - 2.0 - V IO=1A Fig.4 Bias current Ib - 4.5 8.0 mA IO=0mA Fig.5 Bias current change 1 Ib1 - - 0.5 mA IO=5mA1A Fig.5 Bias current change 2 Ib2 - - 0.8 mA VIN=2333V Fig.5 Peak output current IO-P - 1.7 - A Tj =25C Fig.1 Output short-circuit current IOS - 0.3 - A VIN=30V Fig.6 Temperature coefficient of output voltage mV/C IO=5mA, Tj =0125C Fig.1 <BA17824T / FP individual specifications> (unless otherwise noted, Ta=25C, VIN=33V, IO=500mA) Parameter Output voltage 1 Conditions Measurement circuit Symbol Min. Typ. Max. Unit VO1 23.0 24.0 25.0 V IO=500mA Fig.1 VO2 22.8 - 25.2 V VIN=2733V, IO =5mA1A Fig.1 Input stability 1 Reg.I1 - 15 480 mV VIN=2733V, IO =500mA Fig.1 Input stability 2 Reg.I2 - 10 240 mV VIN=3033V, IO =500mA Fig.1 R.R. 50 58 - dB eIN=1Vrms, f=120Hz, IO =100mA Fig.2 Load regulation 1 Reg.L1 - 37 480 mV IO=5mA1A Fig.1 Load regulation 2 Reg.L2 - 15 240 mV IO=250750mA Fig.1 Output voltage 2 Ripple rejection ratio TCVO - -0.7 - Output noise voltage Vn - 180 - V f=10Hz100kHz Fig.3 Minimum I/O voltage differential Vd - 2.0 - V IO=1A Fig.4 Bias current Ib - 4.7 8.0 mA IO=0mA Fig.5 Bias current change 1 Ib1 - - 0.5 mA IO=5mA1A Fig.5 Bias current change 2 Ib2 - - 0.8 mA VIN =2733V Fig.5 Peak output current IO-P - 1.7 - A Tj =25C Fig.1 Output short-circuit current IOS - 0.3 - A VIN=30V Fig.6 Temperature coefficient of output voltage mV/C IO=5mA, Tj =0125C Fig.1 BA178!!T / FP series Regulator ICs "Measurement circuits V ~ eIN 105W INPUT IO COMMON VIN V OUTPUT 0.1F 100F 0.33F 0.1F 0.33F VIN INPUT OUTPUT eOUT V ~ COMMON IO eIN=1Vrms f=120Hz Ripple rejection ratio R.R. = 20 log Fig. 1 Measurement circuit for output voltage, input stability,load regulation, temperature coefficient of output voltage ( eIN eOUT ) Fig. 2 Measurement circuit for ripple rejection rario V 10F INPUT + OUTPUT 0.33F VIN 10Hz 100kHz IO COMMON INPUT BPF 0.1 F Noise meter INPUT VIN 0.1F VIN OUTPUT INPUT 0.1 F OUTPUT 0.1 F 0.33 F VIN IO COMMON V= V 100mA IO IA COMMON Fig. 4 Measurement circuit for Minimum I / O voltage differential Fig. 3 Measurement circuit for output noise voltage 0.33 F OUTPUT 0.33F IO A COMMON A Fig. 5 Measurement circuit for bias current and bias current change Fig. 6 Measurement circuit for Fig. 1 output short-circuit current "Electrical characteristic curves 10 25 6 VIN=10V, IOUT=0 BA17805T 8 6 4 2 (1) 22.0 POWER DISSIPATION : Pd (W) OUTPUT VOLTAGE : VOUT (V) OUTPUT VOLTAGE : VOUT (V) VIN=10V BA17805T 5 4 3 2 1 20 15 (1) Infinite heat sink, j-c = 5.7 (C/W) (2) 100x100x2 (mm3), with Al heat sink (3) 50x50x2 (mm3), with Al heat sink (4) No heat sink j-a = 62.5 (C/W) Note: With Al heat sink, tightening torque = 6 kg/cm and silicon grease as lubricant (2) 11.0 10 (3) 6.5 5 (4) 2.0 0 1.0 1.2 1.4 1.6 1.8 OUTPUT CURRENT : IOUT (A) Fig. 7 Current limit characteristics 2.0 0 25 50 75 100 125 150 175 200 0 25 50 75 100 125 150 JUNCTION TEMPERATURE : Tj (C) AMBIENT TEMPERATURE : Ta (C) Fig. 8 Thermal cutoff circuit Fig. 2 characteristics Fig.9 Ta - power dissipation characteristics (TO220) BA178!!T / FP series Regulator ICs POWER DISSIPATION : Pd (W) 12.5 10 (1) 10.0 (1) Infinite heat sink, j-c = 12.5 (C/W) (2) No heat sink j-c = 125.0 (C/W) 7.5 5 2.5 (2) 1.0 0 0 25 50 75 100 125 150 AMBIENT TEMPERATURE : Ta (C) Fig.10 Ta - power dissipation Fig.3 characteristics (TO252-3) "Operation notes (1) Although the circuit examples included in this handbook are highly recommendable for general use, you should be thoroughly familiar with circuit characteristics as they relate to your own use conditions. If you intend to change the number of external circuits, leave an ample margin, taking into account discrepancies in both static and dynamic characteristics of external parts and Rohm ICs. In addition, please be advised that Rohm cannot provide complete assurance regarding patent rights. (2) Operating power supply voltage When operating within the normal voltage range and within the ambient operating temperature range, most circuit functions are guaranteed. The rated values can not be guaranteed for the electrical characteristics, but there are no sudden changes of the characteristics within these ranges. (3) Power dissipation Heat attenuation characteristics are noted on a separate page and can be used as a guide in judging power dissipation. If these ICs are used in such in a way that the allowable power dissipation level is exceeded, an increase in the chip temperature could cause a reduction in the current capability or could otherwise adversely affect the performance of the IC. Make sure a sufficient margin is allowed so that the allowable power dissipation value is not exceeded. (4) Preventing oscillation in output and using bypass capacitors Always use a capacitor between the output pins and the GND to prevent fluctuation in the output and to prevent oscillation between the output pins and the GND of the application's input (VIN 0.1F should be used.) Changes in the temperature and other factors can cause the value of the capacitor to change, and this can cause oscillation. To prevent this, we recommend using a tantalum capacitor which has minimal changes in nominal capacitance. Also, we recommend adding a bypass capacitor of about 0.33F between the input pin and the GND, as close to the pin as possible. (5) Thermal overload circuit A built-in thermal overload circuit prevents damage from overheating. When the thermal circuit is activated, the various outputs are in the OFF state. When the temperature drops back to a constant level, the circuit is restored. (6) Internal circuits could be damaged if there are modes in which the electric potential of the application's input (VIN) and GND are the opposite of the electric potential of the various outputs. Use of a diode or other such bypass path is recommended. (7) Although the manufacture of this product includes rigorous quality assurance procedures, it may be be damaged if absolute maximum ratings for voltage or operating temperature are exceeded. When damage has occurred, special modes (such as short circuit mode or open circuit mode) cannot be specified. If it is possible that such special modes may be needed, please consider using a fuse or some other mechanical safety measure. (8) When used within a strong magnetic field, be aware that there is a slight possibility of malfunction. BA178!!T / FP series Regulator ICs "External dimensions (Units : mm) BA178OOFP series BA178OOT series 4.5 7.0 +0.3 -0.1 +0.3 -0.1 2.8 +0.2 -0.1 3.10.1 9.50.5 0.65 2.30.2 0.8 0.55 +0.1 -0.05 1.5 2.5 0.65 2.30.2 (1) 2.540.5 0.50.1 0.8 1.3 2.540.5 2.30.2 5.50.2 7.00.3 6.50.2 +0.2 5.0 -0.1 (2) 5.00.2 8.00.2 17.0 +0.4 -0.2 13.5Min. 12.00.2 1.80.2 10.0 +0.3 -0.1 (1) INPUT (2) COMMON (3) OUTPUT 2.60.5 (1) (2) (3) (1) (2) (3) TO220FP 0.50.1 (3) (1) INPUT (2) COMMON (3) OUTPUT TO252-3